Novel AC charging pile sharing implementation method

Abstract

The invention discloses a novel alternating current charging pile sharing implementation method, and belongs to the technical field of charging piles and shared charging. A sharing module is connected in series before or after an alternating current inlet wire of the alternating current charging pile; the sharing module comprises a sharing control module, a voltage and current detection module, a networking module and a relay; the shared charging service logic is realized through the shared control module, the voltage and current detection module acquires charging data as a billing basis, the networking module realizes shared charging functions such as user code scanning charging and the like, and the relay can cut off a charging circuit as required to prevent unauthorized shared users from charging. According to the invention, sharing use of the existing AC charging pile is realized by adding the sharing module, and sharing is realized by low-cost transformation under the condition of the existing AC charging pile, so that the input cost is saved; the utilization rate of an existing alternating current charging pile can be improved, and the power grid capacity expansion pressure caused by charging pile increase is reduced; and sharing popularization of the AC charging pile is promoted.

Description

Technical Field

[0001] The present invention belongs to the field of charging pile technology and shared charging technology, and in particular to a novel method for implementing sharing of AC charging piles. Background Art

[0002] With the rapid popularization of electric vehicles, the number of home AC charging piles has increased rapidly, but parking and charging have always been scarce resources. In order to improve resource utilization, shared charging piles have become a good choice. To achieve sharing of home AC charging piles, they should have three major functions: charging control, charging billing and networking.

[0003] Existing household AC charging piles usually do not have the ability to share charging. To achieve sharing, existing sharing methods mainly focus on replacing AC charging piles with charging control, charging billing, and networking functions, or by modifying the charging pile signals and electrical wiring, which destroys the factory integrity of the existing charging piles, is extremely costly and unsafe. In order to solve the problems of high cost of transformation or purchase, complex construction, frequent failures and low safety in the above methods, the present invention proposes a new AC pile sharing implementation method, which does not require changes to the existing charging piles and lines. By installing a sharing module, charging pile sharing can be achieved. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a new method for sharing AC charging piles in view of the shortcomings of the background technology; it can optimize resource allocation and realize regional resource sharing with low cost and simple construction, thereby alleviating the problem of charging difficulty to a great extent.

[0005] The present invention adopts the following technical solutions to solve the above technical problems:

[0006] A novel AC charging pile sharing implementation method specifically comprises the following steps;

[0007] Step 1, connecting a shared module in series before or after the AC power incoming line of the AC charging pile; the shared module includes a shared control module, a voltage and current detection module, a networking module, and a relay;

[0008] Step 2: The shared charging business logic is implemented through the shared control module. The voltage and current detection module obtains the charging data as the basis for billing. The networking module enables users to scan the code to charge and upload the data to the cloud for shared charging. The relay provides a current path when in normal working state, or can cut off the charging line when necessary to prevent unauthorized shared users from charging.

[0009] As a further preferred solution of a novel AC charging pile sharing implementation method of the present invention, in step 2, the sharing control module is used to implement the shared charging business logic, and the shared charging business logic includes inferring whether the current system is in standby, plugged in but not charging, waiting for permission, normal charging, charging stopped and occupied, charging completed, and whether there is any unauthorized charging behavior.

[0010] As a further preferred solution of a novel AC charging pile sharing implementation method of the present invention, in step 2, for different working states of existing charging piles, the shared device has the ability to infer the charging state algorithm and make corresponding control strategies for different working states; including preventing unauthorized charging behavior when the existing pile is idle; under normal charging needs, controlling the on and off of the line, and having the ability to detect the working current and voltage of the system, being able to realize billing, collect and report current information, and accept remote control; having the ability to automatically disconnect after full detection after charging is completed, settling the order and notifying the owner, and presetting the current plug-in state; for abnormal states, cutting off the charging circuit.

[0011] As a further preferred solution of a novel AC charging pile sharing implementation method of the present invention, the voltage and current detection module includes a voltage detection unit, a current detection unit, and a control unit; the voltage detection unit and the current detection unit are respectively connected to the control unit;

[0012] The current detection unit is used to detect the working current of the shared charging pile, and the voltage detection unit is used to detect the working voltage of the shared charging pile;

[0013] As a further preferred solution of the novel AC charging pile sharing implementation method of the present invention, the current detection unit adopts a current transformer.

[0014] As a further preferred solution of the novel AC charging pile sharing implementation method of the present invention, the voltage detection unit selects a voltage transformer.

[0015] As a further preferred solution of a novel AC charging pile sharing implementation method of the present invention, the relay is controlled by a pulse multivibrator monostable circuit; the pulse control period is determined according to the selection of peripheral inductors and capacitors and the coordinated MCU processing capability, and can be set at 100us-5ms; each pulse period maintains the relay working until the next period through multi-harmonic oscillation, so that the relay can be energized and work; each period needs to detect the pulse state, and if there is no pulse or the pulse period is not within the effective range, the relay is disconnected, which can overcome the defects of direct IO control of the relay's anti-interference and poor stability, and effectively improve the anti-interference ability and safety performance of the shared module; when the system software fails, it still has the ability to cut off the working circuit by hardware, and uses the steady-state circuit to combine the switching characteristics of the transistor to connect to the relay output control; the hardware intervention control signal low-level input is effective, and the high-level cuts off the relay.

[0016] As a further preferred solution of a novel AC charging pile sharing implementation method of the present invention, the shared control module includes a charging control module, and the charging control module includes a signal control end, a charging power supply end, a device power supply end, a battery end, a transistor, a first MOS transistor and a second MOS transistor; wherein the charging power supply end is grounded through a first resistor and a second resistor connected in series; the base of the transistor is respectively connected to the signal control end and the charging power supply end, the collector of the transistor is connected to the gate of the second MOS transistor through a fourth resistor, and is also connected to the source of the first MOS transistor through a third resistor, and the emitter of the transistor is grounded; the source of the second MOS transistor is connected to the charging power supply end through a first diode, and the drain is connected to the device power supply end; the source of the first MOS transistor is connected to the charging power supply end through a first diode, the gate is connected to the connection point of the first resistor and the second resistor, and the drain is connected to the battery end.

[0017] Compared with the prior art, the present invention adopts the above technical solution and has the following technical effects:

[0018] The present invention realizes the shared use of existing AC charging piles by adding a sharing module. In the case of existing AC charging piles, low-cost transformation is used to realize sharing, saving investment costs; it can increase the utilization rate of existing AC charging piles and reduce the pressure on grid expansion caused by the increase of charging piles; and promote the sharing and popularization of AC charging piles. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a schematic diagram of the structure of the charging pile sharing module of the present invention;

[0021] Figure 2 This is a simplified implementation method for mounting a charging pile sharing module of the present invention;

[0022] Figure 3 It is a pulse steady-state control circuit diagram of the relay of the charging pile sharing module of the present invention;

[0023] Figure 4 It is a circuit diagram of the charging control module of the present invention. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings:

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The present invention is described in detail below based on the drawings and preferred embodiments, and the purpose and effect of the present invention will become clearer. It should be understood that the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0026] like Figure 1 As shown, the new AC charging pile sharing implementation method mainly connects a sharing module in series before or after the AC power incoming line of the AC charging pile, and the module realizes the charging control, charging billing, and networking functions; the existing AC charging pile realizes the charging function. The added sharing module consists of a sharing control module, a voltage and current detection module (charging power detection), a networking module, a relay (programmable switch), etc.; the sharing control module realizes the shared charging business logic, the voltage and current detection module obtains the charging data as the basis for billing, the networking module realizes the shared charging functions such as user scanning code charging, and the relay can cut off the charging line when necessary to prevent unauthorized shared users from charging.

[0027] like Figure 2 As shown in the figure, the shared module can be simplified and implemented as an external plug-in on the original line. Just mount the entire module on the neutral or live wire of the original charging pile, estimate the voltage of the national grid, and use batteries or other external power sources to ensure the working current requirements of the shared module. The shared module can be directly mounted on the original line without making any changes to the original line, and the existing charging pile can be shared.

[0028] Signal physical isolation: According to the definition in GBT 18487.1-2015, the handshake control guide signal is the basis for determining whether the car is connected to the charging pile and can start working. In this sharing implementation method, the circuit guide signal between the shared module and the existing charging pile is physically isolated. When the sharing function is implemented, the existing AC charging pile can be retained without replacement or modification. The shared module is installed before or after the AC charging pile, which is simple to construct and has low modification cost.

[0029] Charging status estimation: Based on the current and voltage detection status, the system working status can be inferred and preset, which can normally start charging, charging in progress, charging completed, charging settled and prevent unauthorized charging behavior.

[0030] Charging status control: The shared module has a built-in current and voltage measuring device to measure the current and voltage of the live or neutral line for charging. According to the control instructions, current and voltage parameters, the control module behaves in different working states of the existing charging pile.

[0031] Simplified implementation of shared modules: The shared modules are simplified and can be implemented as external plug-ins on the original lines. Simply mount the entire module on the neutral or live wire of the original charging pile, estimate the voltage of the national grid, and use batteries or other external power sources to ensure the working current requirements of the shared module. The shared module is directly mounted on the original line, and no changes are made to the original line to achieve sharing of existing charging piles.

[0032] Specific implementation process:

[0033] 1. Power-on hold: After power-on, the shared module enters the working state. The L / N relay is closed to keep the power supply to the existing charging pile, and the existing charging pile has the ability to work normally.

[0034] 2. Working status calculation:

[0035] 1) The existing charging pile is not plugged in: When the charging pile is not plugged in, no current loop will be formed. The shared module detects that the current is close to zero and the voltage is within the normal range. At this time, it is determined that the system is in idle or waiting to be charged state. The module and the cloud maintain a handshake and periodically send the module idle state to the cloud.

[0036] 2) Existing charging piles with guns plugged in: When the existing charging pile detects the gun plugging signal, it will automatically start the charging process, the pile will be attracted to supply power to the car, and the circuit will be connected. The charging module can detect that the current value gradually increases and tends to be stable, and the voltage is within the normal range. It is inferred that the system is in the state of gun plugged in or waiting to be charged, and the status data is reported.

[0037] At this time, the shared module starts charging based on whether it receives remote instructions and determines whether the current charging behavior is authorized. If no instructions are received, it is determined that the current behavior is unauthorized. If the current charging behavior is remotely authorized, it enters the normal charging state, the charging gun is determined to be plugged in, and the system enters the charging workflow. The voltage and current detection unit of the shared module detects the signal in real time. If the voltage and current are abnormal, it is determined that the pile state is abnormal and the power supply circuit needs to be cut off. If there is no abnormality, the system working status is continuously monitored and the data is reported to the cloud in real time.

[0038] When the charge reaches a certain level, the current will decrease from the normal value due to trickle charging until the charging is cut off. The shared module can determine whether the system has completed charging based on the change in the charging current. When the current approaches zero and remains for a period of time, the shared module can determine that the charging is complete and upload the charging settlement form to the cloud. During the charging process, the cloud remote control command can be accepted to stop charging. The shared module determines that the plug-in status is not plugged in or plugged in and waiting to be charged.

[0039] 3) Unplug the existing charging pile: In this state, the existing charging pile does not form a circuit, and the shared module does not detect current data. It is determined to be in an idle state and prepares for the next charging process.

[0040] Charging control: After the shared module is powered on and starts normally, according to the above-mentioned state estimation algorithm, after determining that the existing pile and the car are connected, it can receive remote instructions from the cloud, and the relay will be attracted to keep the existing charging pile powered. After the existing charging pile detects that the car and the pile are connected, it can attract the switch to power the car. During normal operation, the shared module continuously monitors the voltage and current data to determine whether they are within the normal range. If there is no abnormality, it receives instructions to end charging or determines that charging is over according to the status, issues control instructions, cuts off the power supply circuit, and uploads the charging order.

[0041] Daily maintenance status: The shared module has daily maintenance capabilities. By determining whether the system's software and hardware working status and line working parameters are normal, it controls the existing charging piles to remain engaged or disconnected. The shared module monitors the voltage and current of the circuit in real time. If the system is working normally and the working parameters are abnormal, the module will respond to the control command immediately and cut off the circuit to ensure power supply safety.

[0042] Unauthorized charging behavior: After detecting unauthorized charging behavior, the shared module will cut off the power supply of the existing charging pile and issue an alarm. After a period of time, it will be re-engaged. If the user is again determined to be unauthorized, the reengagement interval will be extended until the user starts charging behavior through normal procedures. The module sets a maximum recovery time. After this time, the system enters the next cycle monitoring process.

[0043] In applications where the working current does not need to be cut off, the shared module is simplified, and the module working power supply does not need to be connected from the existing charging pile. The module working power supply circuit only needs to be provided by the battery and the external power supply. The current detection function of the shared module is realized by a clamp-type or contactless current sensor. The current sensor is placed on the neutral line or live line of the incoming or outgoing line of the charging pile. According to the working data of the national grid voltage, the working voltage of the charging pile is pre-pushed, thereby realizing the external mounting detection of the working current and voltage. After entering the working state, the process is the same as above.

[0044] Preferably, the voltage and current detection module comprises a voltage detection unit, a current detection unit, and a control unit; the voltage detection unit and the current detection unit are respectively connected to the control unit;

[0045] The current detection unit is used to detect the working current of the shared charging pile, and the voltage detection unit is used to detect the working voltage of the shared charging pile;

[0046] The current detection unit adopts a current transformer.

[0047] The voltage detection unit selects a voltage transformer.

[0048] like Figure 3 As shown, the relay is controlled by a pulse multivibrator monostable circuit. The pulse control period is determined according to the selection of peripheral inductors and capacitors and the processing capability of the MCU, and can be set at 100us-5ms. Each pulse period maintains the relay working until the next period through multi-harmonic oscillation, so that the relay can be energized and work. Each period needs to detect the pulse state. If there is no pulse or the pulse period is not in the valid range, the relay is disconnected, which can overcome the defects of direct IO control relay anti-interference and poor stability, and effectively improve the anti-interference ability and safety performance of the shared module. When the system software fails, it still has the ability to cut off the working circuit by hardware, and uses the steady-state circuit to combine the switching characteristics of the transistor to connect the relay output control. The hardware intervention control signal is valid when the low level input is valid, and the high level cuts off the relay.

[0049] like Figure 4As shown, the shared control module includes a charging control module, and the charging control module includes a signal control terminal, a charging power supply terminal, a device power supply terminal, a battery terminal, a transistor, a first MOS transistor, and a second MOS transistor; wherein the charging power supply terminal is connected to the ground through a first resistor and a second resistor connected in series; the base of the transistor is connected to the signal control terminal and the charging power supply terminal respectively, the collector of the transistor is connected to the gate of the second MOS transistor through a fourth resistor, and is also connected to the source of the first MOS transistor through a third resistor, and the emitter of the transistor is grounded; the source of the second MOS transistor is connected to the charging power supply terminal through a first diode, and the drain is connected to the device power supply terminal; the source of the first MOS transistor is connected to the charging power supply terminal through a first diode, the gate is connected to the connection point of the first resistor and the second resistor, and the drain is connected to the battery terminal. MOS transistors are used as power devices, and the power supply efficiency is high; when the device battery is charged, the battery power supply can be cut off and the power supply is used to power the device instead, so as to protect the battery and prolong the battery life; the device can be turned on and off by hardware and software, and can also be reset through the hardware reset port to shut down the device.

[0050] Those skilled in the art can understand that the above are only preferred examples of the invention and are not intended to limit the invention. Although the invention is described in detail with reference to the above examples, those skilled in the art can still modify the technical solutions recorded in the above examples or replace some of the technical features with equivalents. Any modification, equivalent replacement, etc. made within the spirit and principle of the invention should be included in the protection scope of the invention. All technical features in this embodiment can be freely combined according to actual needs.

Claims

1. A new method for sharing AC charging piles, characterized in that: The specific steps include: Step 1, connecting a shared module in series before or after the AC power incoming line of the AC charging pile; the shared module includes a shared control module, a voltage and current detection module, a networking module, and a relay; Step 2: The shared charging business logic is implemented through the shared control module. The voltage and current detection module obtains the charging data as the basis for billing. The networking module enables users to scan the code to charge and upload the data to the cloud for shared charging. The relay provides a current path when in normal working state, or can cut off the charging line when necessary to prevent unauthorized shared users from charging.

2. A novel AC charging pile sharing implementation method according to claim 1, characterized in that: In step 2, the shared control module is used to implement the shared charging business logic, which includes inferring whether the current system is in standby, plugged in but not charging, waiting for permission, normal charging, charging stopped, charging completed, and whether there is any unauthorized charging behavior.

3. A novel AC charging pile sharing implementation method according to claim 1, characterized in that: In step 2, the shared device has the ability to infer the charging status algorithm for different working states of the existing charging piles, and make corresponding control strategies for different working states; including preventing unauthorized charging behavior when the existing piles are idle; controlling the on and off of the lines under normal charging needs, and having the ability to detect the working current and voltage of the system, capable of billing, collecting and reporting current information, and accepting remote control; having the ability to automatically disconnect after full detection after charging is completed, settling the order and notifying the owner, and presetting the current plug status; In case of abnormal condition, the charging circuit is cut off.

4. A novel AC charging pile sharing implementation method according to claim 1, characterized in that: The voltage and current detection module comprises a voltage detection unit, a current detection unit, and a control unit; the voltage detection unit and the current detection unit are respectively connected to the control unit; The current detection unit is used to detect the working current of the shared charging pile, and the voltage detection unit is used to detect the working voltage of the shared charging pile.

5. A novel AC charging pile sharing implementation method according to claim 1, characterized in that: The current detection unit adopts a current transformer.

6. A novel AC charging pile sharing implementation method according to claim 1, characterized in that: The voltage detection unit selects a voltage transformer.

7. A novel AC charging pile sharing implementation method according to claim 1, characterized in that: The relay is controlled by a pulse multivibrator monostable circuit; the pulse control period is determined according to the selection of peripheral inductors and capacitors and in coordination with the processing capability of the MCU, and can be set at 100us-5ms; each pulse period maintains the relay working until the next period through multivibrator oscillation, so that the relay can be energized and work; each period needs to detect the pulse state, and if there is no pulse or the pulse period is not within the effective range, the relay is disconnected, which can overcome the defects of direct IO control of relays in terms of anti-interference and poor stability, and effectively improve the anti-interference ability and safety performance of shared modules; when the system software fails, it still has the ability to cut off the working circuit by hardware, and uses the steady-state circuit to combine the switching characteristics of the transistor to connect to the relay output control; the low-level input of the hardware intervention control signal is effective, and the high-level cuts off the relay.

8. A novel AC charging pile sharing implementation method according to claim 1, characterized in that: The shared control module includes a charging control module, which includes a signal control terminal, a charging power supply terminal, a device power supply terminal, a battery terminal, a transistor, a first MOS transistor and a second MOS transistor; wherein the charging power supply terminal is grounded through a first resistor and a second resistor connected in series; the base of the transistor is respectively connected to the signal control terminal and the charging power supply terminal, the collector of the transistor is connected to the gate of the second MOS transistor through a fourth resistor, and is also connected to the source of the first MOS transistor through a third resistor, and the emitter of the transistor is grounded; the source of the second MOS transistor is connected to the charging power supply terminal through a first diode, and the drain is connected to the device power supply terminal; the source of the first MOS transistor is connected to the charging power supply terminal through a first diode, the gate is connected to the connection point of the first resistor and the second resistor, and the drain is connected to the battery terminal.

Images